Wire Harness LS to SS Map Adapter

The Wire Harness LS to SS Map Adapter from Holley is an essential connector for builders integrating modern LS-series engine management into vehicles originally equipped with older generation powertrains or aftermarket platforms. This adapter bridges the gap between GM's advanced LS engine harness architecture and legacy or alternative engine bay layouts, enabling seamless ECU communication without requiring complete rewiring. Whether you're performing an engine swap, upgrading fuel injection mapping, or retrofitting diagnostic capabilities, this harness adapter eliminates the need for custom fabrication and reduces installation time significantly.

Engineered with Delphi-specification connectors, the Wire Harness LS to SS Map Adapter converts from a Delphi M/P 3-pin configuration to a Delphi GT 3-pin configuration, ensuring secure and reliable signal transmission between your engine control unit and sensor inputs. The compact design—measuring 2.35 x 2.35 x 4.75 inches and weighing just 0.11 lbs—fits easily into tight engine bays without adding bulk or requiring lengthy routing modifications. Holley's quality construction guarantees proper pin alignment and corrosion-resistant connections, critical for maintaining accurate real-time engine data feedback and preventing lean-out conditions or check engine codes that plague improvised harness solutions.

Mechanics and engine swap specialists benefit most from this adapter when installing LS engines into older muscle cars, street rods, or non-GM platforms where original wiring harnesses are incompatible with modern Holley EFI systems or standalone ECU configurations. Installation is straightforward—simply connect the adapter between your engine harness and the corresponding map sensor or fuel injector circuit without soldering or splicing. This product is ideal for anyone running Holley's LS engine management software or comparable GM LS engine control strategies and ensures your fuel mapping, ignition timing, and emissions monitoring remain accurate throughout the power band.